William ievin bettis



(No Model.)

. I. BETTIS.

BALANGBD SLIDE VALVE.

No. 350,718. Patented Oct. 12, 1886.

UNITED STATES PATENT OFFICE.

VILLIAM IRVIN BETTIS, OF ORANGE, TEXAS, ASSIGNOR OF ONE-HALF TO D.MORRISON, OF SAME PLACE.

BALANCED SLIDE-VALVE.

SPECIFICATION forming part of Letters Patent No. 350,718, dated Octoberl2, 1886.

Application filed June 23, 1856. Serial No. 205,993.

To all whom t may concern:

Be it known that I, WILLIAM IRvIN BETTIs, acitizen ofthe United States,residing at Orange, in the county of Orange and State of Texas, haveinvented certain new and useful Improvements in Balanced Slide-Valves,of which the following is a full, clear, and exact description,reference being had to Vthe accompanying drawings, forming part of this1o specification, in which- Figure l is a side elevation of asteam chestwith my improvements applied thereto. 2 is a plan View ofthe same. Fig.3 is a sectional View on the line x :c of Fig. 2. Fig. 4

I5 is asimilar view on the line y g/ ot Fig. 2.

My invention relates to certain improvements applied to slide-valves forcounterbalancing the pressure on the valve; and it consists in thepeculiar construction and combi- 2o nation of devices which I shallhereinafter fully describe and claim.

To enable others skilled in the art to which my invention appertains, Iwill now describe its construction and indicate the manner in which thesame is carried out.

ln the said drawings, A represents a steamchest of any suitableconstruction, having the usual valve-seat fora reciprocating slidevalve,and B represents a chamber bolted to the top i ofthe steam-chest, withits lower end in communication with the steam-chest through an opening,a, formed in the top of said chest.

Between the upper end of the chamber Band a cap or plate, O, boltedthereto is placed a L- diaphragm, D, whose surface may be eithercorrugated or plain. The valve E may be of the usual form of slidevalve, and is connected. with an adjustable valve stem, F, which passesthrough a packing-gland, G, as illustrated in Fig. 3. From theconstruction and arrangement of these features it is clearly manifestthe steam-pressu re in the steam-chest presses down upon the valve andup under the diaphragm, whereby the pressure on the diaphragmcounterbalances the pressure ou the valve. From the upper side of thevalve there project lugs b, between which is pivotally secured the lowerend of a link, c,where by the valve is permitted to vibrate in thedirection of its travel. The upper end of the link cis attached toalink,d, by a connection,

(No model.)

e, similar to that which secures the lower end of the link c, althoughthe connection e is arranged at right angles to the first connection,whereby the valve may have a lateral movement to adjust itself' to itsseat. A frame, H, cast or otherwise formed, is secured to the diaphragmwith the aid of a collar or washer,

f, and is provided with a packing-box, g, and packing-gland IL,throughwhich passes astem or 6o rod, l, whose lower end is pivotallysecured to the link d in a manner similar to the connections previouslydescribed. The upper end ot' thestein Z isthreaded and passes throughthe top ofthe frame H, and is secured by suitable iam-nuts, m, wherebythe length of the connection previously described is adjusted. I am thusenabled to attach a counter-balance to the slide-valve which, for simplicity, economy, and durability, is far superior toumany 7o ot' thedevices used for accomplishing the same purpose at the present time. InaddiA tion to this, the attachment is readily applied to the commonslide-valve without any niaterial alteration of said valve, as the lugsb may be screwed or riveted to the top of the valve without departingfrom the spirit of my invention.

Having thus described my invention,what I claim as new, and desire tosecure by Letters 8o Patent, is-

1. The steam-chest, avalve sliding therein, and a chamber above thesteam-chest and in communication therewith, in combination with a frame,H. and a diaphragm, D, `mounted on top ofthe chamber, and adjustablelink-connection between the diaphragm and valve, whereby the latter mayhave longitudinal and lateral adjustment, substantially as described.

2. The steanrchcst, a valve sliding therein, 9o a chamber on top ot' thesteam-chest,and a diapliragm in the top of the chamber and secured by acap or plate, in combination with a frame, H, having a packing-box andgland, an adjustable threaded stem or bolt passing through the frame,andthe double-link connection between the said stem and valve,substantially as described.

NVILLIAM IRVIN BETTIS.

IVitnesses:

S. W. SHoLARs, JNO. T. HART.

